George r



(No Model.)

G. R. ANDERSON.

SPARK ARRESTER.

No. 449,512. Patented Mar. 31,1891.

Georye Mir-6011 w M 1m w E UNITED STATES PATENT ()FFKCE.

GEORGE R. ANDERSON, OF ROANOKE, VIRGINIA, ASSIGNOR OF ONE-HALF TO DANIEL RICHARDSON, OF SAME PLACE.

S PARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 449,512, dated March 31,1891.

Application filed October 4, 1890. Serial No. 867,060. (No model.)

To all whom it may concern:

Be it known that I, GEORGE it. ANDERSON, a citizen of the United States, residing at Roanoke, in the county of Roanoke and State of Virginia, have invented a new and useful Spark-Arrester, of which the following is a specification.

Myinveution relates to spark-arresters; and it has for its object to divert or deflect the sparks and prevent that annoyance occasioned by their going in at car-Windows, and also the danger of their setting fire to inflammable objects on the line of the railroad ,and it has also as an object to provide for the release and elimination of the gases and smoke to such an elevation that they will be of no inconvenience to passengers or trail with the cars.

With these ends in View theinvention consists of the peculiar construction and combination of parts, as will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a vertical sectional view of a spark-arrester constructed in accordance with my invention, showing the same in position upon alocomotive-boiler. Fig. 2 is a transverse sectional view taken on the line :17 a: of Fig. 1. Fig. 3 is a horizontal sectional view on the line y y of Fig. 1.

Like numerals of reference denote like parts in all the figures of the drawings, referring to which, 1 designates the boiler of an engine, the forward portion only being shown; 2, the smoke-pipes or fines, and 3 the exhaust-compartment.

My invent-ion consists of a smoke-stack 4 arranged Within a suitable boxing or jacket 7. The smoke-stack 4 is square in cross section and is provided near the upper end with perforations 6 in each side thereof, the area of said perforations being equal to double the area of the cross sections of the interior of the smoke-stack 4. The boxing or jacket 7 is arranged to inclose the Smokestack 4, and at the lower end is rectangular in form and of a suitable size to snugly fit the said smokstack 4 at the back and sides, but extends forwardly far enough to leave aspace 8 between the front wall of the smoke-stack and the front of the inclosing jacket 7. The smoke-stack 4 is inclined backwardly, as shown in Fig. 1, and has arranged upon the top thereof a hood or deflector 9, which latter is secured to the back and sides of the smoke-stack 4 and also to the back of the interior of the jacket 7. This hood or deflector 9 is curved over the smoke-stack 4, and extends from the back to the front wall of the jacket 7, and has its sides 10 cut away, as at 11,'leaving the forwardlyextending strip or roof 12, the front end of which is secu red to the front wall of the jacket 7, as shown in Fig. 1. The sides 10 and roof 12 of the deflector 9 are provided with perforations 13, the purpose of which willbe set forth hereinafter. The boxing or jacket 7 is flared or enlarged up to the point a, just above the points to which are secured the hood or deflector 9, and during this enlargement it gradually assumes a round shape, as shown in Fig. 3, leaving a space 14 around three sides of the smoke-stack 4, which space communicates with the space or opening 8.

A dome '15 is arranged on top of the jacket 7, at the top of which dome is formed an opening 16 for the egress of smoke. For convenience of access to the interior of the jacket 7 the said dome 15 is hinged thereto, as shown at 17 in Fig. 1, and provided with a suitable fastening 18.

A diaphragm 19 is arranged within the boiler 1 at a point just below the front wall of the smoke-stack 4, forming a chamber or compartment 20 in the extension front of the boiler for the reception of cinders and sparks.

In order to regulate the size of the exhaustchamber 3, thediaphragin 19 is arranged so as to be movable for a limited distance in a longitudinal direction within the boiler,which movement is accomplished as follows: Within the boiler 1 is fitted a ring 21, having an inwardly-projecting flange 22, to which the diaphragm is secured. The ring 21 is provided with slots 23, through which the bolts 24 are passed to secure it to the boiler. It will be understood that by loosening the bolts 24 the ring 21, and with it the diaphragm, may be removed to increase or decrease the size of the exhaustcompartment 3,.as may be found necessary.

My invention is secured upon the forward end of the boiler 1 by means of a saddle 25, having an upwardly-projecting flange 26, in which are seated both the jacket 7 and the smoke-stack 4, the bolts 27 passing through and holding both on the back and sides, while the bolts 28 on the front hold the front of the jacket 7, only the front of the Smokestack 4 being bolted to a transverse piece 29, secured in the forward part of the saddle 25. The position of the spark-arrester upon the boiler is such that the exhaust-compartment 3 communicates with the interior of the smokestack 4, and the cinder-compartment 20 communicates with the space 8.

The operation of my invention is as follows: The smoke, cinders, and other-products of combustion coming through the flues 2 enter the exhaust-compartment 3, and by reason of the draft created therein pass upwardly through the smoke-stack 4. the gaseous and other volatile matter passing through the perforations 6 and 13 and around the sides 10 10, where they are cut away at 11 11, into the space 14:, and escape by the mouth or opening 16 in the dome 15, while the sparks, cinders, and larger products of combustion strike the curved hood or deflector 9, and are thereby turned downwardly through the opening 8 into the cinder-compartment 20 from which they can be easily removed through the door 30 in the front end of the boiler. Should it be desired to dispense with the extension front, Iprovide a spark-box 31, (shown in dotted lines in Fig. 1,) the dotted lines 32 showing where the extension front may be cut away. To relieve the cinder-compartment of air which might become compressed therein from the action of the products of combustion passing rapidly through the opening 8, I pro-v vide a vent-pipe 33, the lower end of which enters the cinder-compartment 20 through the opening 8. The said vent-pipe 33 extends upwardly within the jacket 7, to which it is attached, and the upper end thereof opens into the mouth or opening 16, thus making an outlet for the air which is not affected by the pressure within the jacket 7.

It will be understood that I do not wish to limit myself to the precise details of construction herein set forth, as I am aware that modifications may be made therein without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, isv 1. In a spark-arrester, the boiler, an adj ustable diaphragm havinga flange 21, and means whereby the said diaphragm may be adjusted longitudinally within the said boiler divid ing the exhaust-compartment from the cinder-box, the size of the exhaust-compartment being regulated by the adjustment of said diaphragm, the smoke-stack communicating with both the exhaust-compartment and the cinder-box, the deflector in the smoke-stack to deflect thecinders and sparks as they ascend the smoke-stack from the exhaust-compartment into the cinder-box, the pipe 33, arranged within the smoke-stack, the lower end of the said pipe opening into the cinder-box, and the upper end thereof being secured rigidly to the inner face of the smoke-stack and opening through the upper end of the same, so as to be iuclosed by the latter, and to form an unobstructed outlet for all gases which may accumulate in the cinder-box, substantially as described.

2. In a spark-arrester, the boiler having an adjustable diaphragm dividing the exhaustcompartment from the cinder-box, the smokestack communicating with the exhaust-compartment and the cinder-box, the said smokestack comprising an inclosing case opening into the cinder-box, a smoke-stack proper situated within the said inclosing case and communicating with the exhaust-chamber, perforations 6 in the sides of the said smoke-stack proper, the deflector curved over thesmokestack and provided with the perforations 13, and having its sides cut away, as shown at 11,

to allow the smoke and gases to pass upward, 5

but to deflect the sparks, and cinders down through the inclosing case into the cinderbox, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

- G. R. ANDERSON.

Witnesses:

R. J. MARSHALL,

D. P. WOLHAUPTER.

IOO 

